package com.jxust.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Component
public class DemoInterceptor implements HandlerInterceptor {

    //preHandle:在业务处理器处理请求之前被调用
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info( "preHandle....");
        return true;
    }

    //postHandle:在业务处理器处理请求执行完成后,生成视图之前执行
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info( "postHandle...");
    }


     //afterCompletion:在DispatcherServlet完全处理完请求后被调用,可用于清理资源
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

        log.info( "afterCompletion...");
    }
}
